You did a really good job on the rocks to make the tops of them blend in so nicely.

Your background trees look misty in the distance, creating a good sense of depth.

The waterfalls from the top and middle of the picture look great. On the bottom set of rocks, the third and fourth rocks from the left look like they need a bit more water as they come over the rocks, especially the fourth one.

Aike, what you have done has been done very well What is missing are the darker shadows which will give a good tonal range over the painting. Remember it is the values (tonal = lights and darks) that make a painting, more than the actual colour itself. Don't be afraid of the darks. Do this and post the revised painting below the existing one so all can see the comparison